|Generate QR code
Open Access
Subscription Access
Application of 1H Low-Field NMR Spectroscopy for the Determination of the Concentration and Molecule Weight of Polycarboxylate Superplasticizers
Abstract
As a type of water reducer, polycarboxylate superplasticizers (PCEs) has been widely used in the concrete industry. The concentration and molecule weight of PCEs have a profound impact on the performance of fresh concrete. Based on 1H low-field nuclear magnetic resonance (NMR) spectroscopy, this paper developed a novel method for the determination of the concentration and characterization of the molecule weight of PCEs. Five types of PCEs with various ether to acid ratios (3:1 to 5:1) and functional groups were syn-thetized in laboratory conditions, and their molecular structures were characterized by size exclusion chromatography. PCE solutions with concentrations from 0 to 40% were measured using the Carr-Purcell-Meiboom-Gill sequence by 1Н low-field NMR. The results showed that the T2 value of the main peak has a linear relation with the PCE concentration. The signal intensity of peaks whose T2 values are smaller than 10 ms of the PCE solutions with a concentration of 20% is linearly correlated to the molecule weight of PCEs.
Keywords
polycarboxylate superplasticizers,
concentration,
molecule weight,
:H low-field Carr-Purcell-Meiboom-Gill spectroscopy
Supporting agencies: The authors acknowledge the financial support provided by the China National Key R&D Program during the 13th Five-year Plan Period (Grant No. 2016YFC0701004), the National Natural Science Foundation of China (Grant No.51678441), the Science and Technology Commission of the Shanghai Municipality (Grant No. 19DZ1202702 and 19DZ1201404), and the Key Science and Technology Foundation of the Gansu Province (Grant No. 19YF3GA004). Gratitude is extended for support from the Shanghai Post-doctoral Excellence Program (2019-2020) and Visiting Scientist project in the Darcy Center of TU/e (2019-2020), the project of ‘High-level Foreign Experts’ in Tongji University, and the China Scholarship Council. We also like to thank Niumag Electric Corporation (Shanghai, China) for their assistance in performing these measurements
About the Authors
Y. Ji
Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, School of Materials Science and Engineering at Tongji University
China
China
Shanghai 201804
Zh. Sun
Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, School of Materials Science and Engineering at Tongji University
China
China
Shanghai 201804
M. Pang
Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, School of Materials Science and Engineering at Tongji University
China
China
Shanghai 201804
J. Yang
Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, School of Materials Science and Engineering at Tongji University
China
China
Shanghai 201804
References
1. J. Plank, E. Sakai, C. W. Miao, C. Yu, J. X. Hong, Cem. Concr. Res, 78, 81-99 (2015).
2. Y. Yu, J. Liu, Q. Ran, et al., J. Therm. Anal. Calorim, 111, 437-444 (2013).
3. Z. Zhang, Z. Wang, J. Ren, J. Pei, Iran. Polym. J., 25, No. 6, 549-557 (2016).
4. S. Qian, Y. Yao, Z. Wang, et al., Constr. BuildMater., 169, 452-461 (2018).
5. H. Yan, Z. Xiong, S. Yaning, et al., J. Wuhan Univ. Technol. Mater. Sci., 33, No. 4, 932-937 (2018).
6. Y. Qian, K. Lesage, K. E. Cheikh, G. D. Schutter, Cem. Concr. Res., 107, 75-84 (2018).
7. H. Yan, Z. Xiong, S. Lianglinag, et al., Constr. Build. Mater, 202, 656-668 (2019).
8. K. Yamada, T. Takahashi, S. Hanehara, et al., Cem. Concr. Res., 30, No. 2, 197-207 (2000).
9. Y. R. Zhang, X. M. Kong, Z. B. Lu, et al., Cem. Concr. Res, 67, 184-196 (2015).
10. X. Q. Qiu, X. Y. Peng, C. H. Yi, Y. H. Deng, J. Disp. Sci. Technol, 32, No. 2, 203-212 (2011).
11. K. R. Brownstein, C. E. Tarr, Phys. Rev. A, 19, 2446-2453 (1979).
12. M. Brax, M. Kohne, E. Kroener et al., Geoderma, 340, 269-278 (2019).
13. Y. J. Yuan, R. Z. Rezaee, M. Verrall, et al., Int. J. Coal Geol, 194, 11-21 (2018).
14. Y. Ji, Z. Sun, J. Yang, P. Leo, et al., Constr. Build. Mater, 240, 117938, ISSN 0950-0618 (2020).
15. Y. Ji, P. Leo, Z. Sun, Cem. Concr. Res, 125, 105866, ISSN 0008-8846 (2019).
16. Lhcio L. Barbosa, Flavio V. C. Kock, et al., Energy Fuels, 27, No. 2, 673-679 (2013).
17. F. C. Giovanna, C. S. Renzo, L. B. Lhcio, et al., Fuel, 140, No. 15, 762-769 (2015).
18. L. Luetkmeyer, B. T. Maria Ines, et al., Macromol. Symp, 258, No. 1, 108-112 (2007).
19. Y. Ji, Z. Sun, et al., Constr. Build. Mater., 100, 255-261 (2015).
20. C. Pathama, C. Pavinee, S. Klanarong, et al., Carbohydr. Polym, 53, No. 3, 233-240 (2015).
Review
For citations:
Ji Y., Sun Zh., Pang M., Yang J. Application of 1H Low-Field NMR Spectroscopy for the Determination of the Concentration and Molecule Weight of Polycarboxylate Superplasticizers. Zhurnal Prikladnoii Spektroskopii. 2021;88(2):255-260.
Views: 204
Email this article 